Alarm-lock.



PATENTED JULY 2, 1907.

H. G. FERGUSON. ALARM LOCK.

APPLIOATION FILED MAR. 15, 1906.

WITNESSES:

A TTORNJVSI '5 UNITED STATES PATENT OFFICE.

HENRY CHAS. FERGUSON, OF WALLA WALLA, WASHINGTON, ASSIGNOR OF ONE-HALF TO WARD O. GOODMAN, OF WALLA WALLA, WASHINGTON.

ALARM-LOCK.

Specification of Letters Patent.

Patented July 2, 1907.

Application filed. March 15, 1906 Serial No. 306,265-

To all whom it may concern:

Be it known that I, HENRY CHAS. FEReUson, a citizen of the United States, residing at Walla Walla, in the county of Walla Walla and State of Washington, have invented a new and useful Alarm-Lock, of which the following is a specification.

This invention relates to looks and more particularly to devices of this character having an alarm attachment adapted to be operated whenever the lock is actuated by unauthorized persons.

The object of the invention is to provide a strong, neat and compact lock of this nature having means whereby the movement of the lock bolt will vibrate a hammer and cause the sounding of an alarm.

Another object is to provide means whereby considerable movement may be imparted to the bolt by the lock key in order to prolong the sounding of the alarm.

With the above and other objects in view the invention consists of a casing having a spring pressed bolt adapted to be engaged by a key of novel form, whereby,

- when the key is inserted in the lock and turned, considerable longitudinal movement is imparted to the bolt. Fingers are arranged upon the bolt and engage a wheel which is rotatably mounted in the casing and is adapted to be engaged and turned in one direction only by the fingers when the bolt is reciprocated. A vibrator rotates with the ratchet wheel and is contacted by, and adapted to actuate one or more spring pressed dogs and thus vibrate one or more hammers within a bell.

The invention also consists of certain other novel features of construction and combination of parts which will be hereinafter more fully described and pointed out in the claims.

In the accompanying drawings, 1 have shown the preferred form of my invention.

In said drawings :-Figure 1 is an inner elevation of the lock, the bell being shown by dotted lines. Fig. 2 is a section through the lock taken below the inner face plate thereof. Fig. 3 is an edge view of the locking bolt. Fig. 4 is a section on line 4- 4 of Fig. 1, and Fig. 5 is a detail view of a key to be used with the lock.

Referring to the figure by numerals of reference, 1 is a casing having a removable face plate 2 containing a key hole 3. The opposite face plate 4 has a circular recess 5, therein communicating through slots 6 with the interior of the casing. A yoke 7 is secured to the face plate 4 and extends over recess 5 and a spindle 8 is secured at one end in this yoke and at the other end in the inner wall of recess 5.

A small ratchet wheel 9 is rotatably mounted in recess 5 and upon spindle 8 and a larger ratchet wheel 10, constituting a vibrator, rotates upon the spindle with the ratchet wheel and extends over and closes the recess 5.

Posts 11 are located on the face plate 4 adjacent opposite portions of the vibrator 10, and secured in each post is one end of a spring strip 12, having a head 13 at its free end. The two strips extend in opposite directions and over dogs 14, which are pivoted on the plate 4 at points between their ends and contact with the notched periphery of the vibrator 10.

Pins 15 extend upward from the dogs 14 and contact with spring strips 12 so that said strips will hold the dogs normally in contact with the vibrator and will be rapidly oscillated by the dogs as said vibrator rotates. A bolt 16 is slidably mounted within the casing and has a beveled end 17 normally projecting therefrom. A stem 17 extends from the bolt at the inner end thereof and a spring 18 is mounted on this stem and serves to hold the bolt normally projected. Recesses 19 are formed longitudinally in that face of bolt 16 contacting with face plate 4 and in these recesses are secured oppositely extending spring fingers 20, each being provided with a lateral extension 21, which projects through one of the slots 6 into engagement with teeth on ratchet wheel 9. The extensions 21 are located at diametrically opposite points on the ratchet wheel.

An elongated recess 22 is formed in one edge of bolt 16 and has a rack 23 on one wall thereof and extending longitudinally of the bolt. The key hole 3 opens into one side of this recess 22 and a stud 24 extends from face plate 4, through recess 22 and into the key hole and' is adapted to guide a key into proper position'in the lock. A pin 25 extends from bolt 16 through a slot 26 in face plate 4 and by means thereof the bolt 16, can be retracted from inside the door. A locking dog 27 is pivoted adjacent the slot 26 and is adapted to be swung into the path of pin 25 so as to hold it against movement when the bolt is retracted.

The key to be used with this lock is preferably formed with a barrel 28 having a series of teeth 29 radiating from one end. The key hole must of course be so shaped as to receive these teeth.

to be sounded by the heads on spring strips 12.

When it is desired to retract the bolt 16 the finger key is inserted and turned until the teeth thereon engage the rack 23, whereupon the boltwill be slid back into the casing and compress the spring 18.

The extension 21 on one of the spring fingers 20, will at the same time engage and partly rotate the ratchet wheel 9, and cause the vibrator to turn and operate the dogs 14 which will vibrate strips 12 and cause the bell to be sounded.

When the bolt is released the compressed spring 18 will return it to its normal position during which time the extension 21 on the other finger 20 will continue the rotation of the ratchet wheel and vibrator, and consequently the sounding of the bell.

A bell 30 is fastened to the spindle 8 and over yoke 7 and is adapted- Having thus described the invention What is claimed l. A lock consisting of a bolt, an alarm, a rotary vibrator for operating the alarm, a rotatable device movable with the vibrator, and oppositely disposed means upon the bolt for engaging and operating the rotatable device in one direction only during the actuation of the bolt.

2. A look consisting of a bolt, a rotatable vibrator, a ratchet Wheel movable therewith, oppositely disposed spring ratchet-engaging devices upon the bolt, a bell, and means operated by the vibrator for sounding the hell.

3. A lock consisting of a bolt, a rotatable vibrator, a ratchet wheel movable therewith, oppositely disposed spring ratchet-engaging devices upon the bolt, a bell, a spring strip adjacent: the vibrator, a dog held in contact: with the vibrator by said strip, and a head upon the strip for sounding the hell.

4. A lock consisting of a bolt, an alarm, a vibrator for operating the alarm, resilient devices upon and movable with the bolt, and means engaged and actuated by said devices for operating the vibrator during the movement of the bolt in either direction.

In testimony that I claim the foregoing as my own, I have hereto atlixed my signature in the present-e of two Witnesses.

HENRY CHAS. FERGUSON.

Witnesses .T. W. MACKAY, FRED Seo'r'r. 

